Rock-drill.



No. 312.375. PATENTBD FEB. 1a, 1906.

c. J. SMITH: ROCK DRILL.

APPLIOA'IION run we. 7. 1906.

2 SHEETSSHBET 1.

I ATTORNEYS.

PATENTED FEB. 13, 1906.

O J. SMITH. ROCK DRILL.

APPLIGATION FILED AUG. 7, 1905.

2 $HEETS-SHEET 2.

. I m 1% 7? A My.

ATTORNEY UNITED STATES.

PATENT OFFICE,

CLARK J. SMITH, F orrumvlarowa, ASSIGNOR TO THE HARDsocG woumca' mum. courAsY, ()F o'rruMwA, IOWA.

' ROCK.-

No. 812.375. Specification of useful im rovements in rock-drills, and it particular y seeksto provide a tool of this character so arranged that'it can be mounted on an arm, column, or post and when set in )osition to drill or bore thc'holc it will not ave to be changed in any way from the alinement of the hole in order to .change the bits, thereby savin a considerable amount of time in changing its.

Again, m invention seeks to provide a tool of this 0 aracter in which means are revided for automatically feeding the dri or rock as fast as it cuts or bores the material, which feed is automatic in its operation and will adjust itself when drilling or' boring in substances that meet variable hardness, and thereby relieves the operator of unnecessary labor of feeding the machine. 4

My invention also seeks to provide a tool of this character so mounted as to be capable of drilling at all angles and in which'means are provided for removing the drilleasing and the operative parts of the drill proper from the support to enable the bits to be changed without altering the position of the sup ort, so that when thc parts are again assem led the drill will once more be in alinement with the hole, and thus avoid the necessity of re eated adjustments. I

Generical y my invention comprises a drill includin a casing providedwith an external threade portion, a pneumatic hammer within the casing, a drill-receiving chuck carried by the casing, a supporting-casing or tubular member to receive the drill-casing, and a friction worm-gear mounted on the supportingcasing for cooperating with the threaded portion of the drill-casing,'a second su ui't for receivim the su ortin casin a third support for receiving t e second support, and a fourth support for receiving the third support, all being arranged so that the drill can be adjusted to any angle desiredand after once adiustcd will always be held in such position during changes ofdrills and during the'operation of the machine.

DRILL.

Letters Patent. Patented Feb. 13, 1908.

1905. SerislNo.273,125.

tofore been specified the invention comprises 5 5 certain novel construction, operation, combination, and arrangement of parts, all of which will be first described in detail and then he s ccificall pointed out in the appended c aims, re erence being had to the accompa- 6o tica cross-section on the'liiie 2 2 of Fig} 2. 6 5

Fig. 4 is a similar view on the'line 4 4 of g. 2. Fig. 5 is a horizontal section on the line 5 5 of Fig. 2 looking in'the' direction of the arrow, the worm-gear being shown in plan.

eferring new to the accompanying draw ings, in which like numerals of reference in-. dicatevlikc parts in all of the figures, 1 desi Fig. 6 is a cross-sectione the line 6 6 of 7c nates .the drill casing, whichis externaly 7i threaded; asat 1, and hasan internal bore f1i", in which'the hammer-barrel 2 is tightly tted.

vid'ed with a central threaded bore 1 to re- At its rear end'lthe casing 1 is pro ceive theplug 3, which has a centralhollow 8c chamber 3*.and a'flange 3", which abuts the end of the casing or barrel 1 of the drill. The plug 3 also has a rearwardly-extending portion 3, provided with an externally-thread .of the plug 3 is a loose collar 5}having amen-- 'tral internal chamber 5 for cooperating'with the apertures 3' and an internally-threaded.

pipe-receiving portion 5 toreceive the plipfi C connection 6 of the air-supply pi 7, w is controlled by the valve 7;, as s jown. each side of the loose collar 5}: fiber washer 8 8 is placed on the hub or extension 3 of hi 3, and the collars 8 8 and the collar 6 ar 6.;

the check nuts Q 9":

1el i in position b V v threaded onto the t ireaded portion3 of the plug 3, as shown, it being understood that the collar 5 is so adjusted asto permit the rotating the collar 5. v

The hammer-barrel 2, before referred to,

With other objects in view than have herehas-a chamber 2 in the frontthcreof to re.

Fitted on the extending films pdrtiiln a 9 ed portion 3, and whose end 3 is adapted to 8 berrel l and the plug 3 being rotated without m5 3 a to. permit the workmgc vided with internal webs 2 2 and annular chambers 2 2 2 2', respectively. The rear end 2 of the barrel is internally threaded, as

at 2, to receive the plug 12, as shown. The barrel 2 has an outerannular chamber 2, which communicates with the rear portion :-1 x

of the chamber 1 of the casin 1 through a fmember 20, to which it is clamped by the bolt 19, as shown, and which permits adjustseries of ports or grooves 2 in t e barrel 2, as shown and the said chamber2'communicates with-the interior of the barrel through the ports 2, as shown. Reciprocally mounted within the barrel 2 is the hammer-piston 13,

' which has the usual head 14 and an enlar annular portion 13 at therear thereof; w e

a chamber 13 is formed within the piston. .13, as shown, and is open at the rear of the piston to communicate with the chambers 2' 2"" of the barrel 2, a series of radial ports 13 being alsopr'ovided for the samepurpose, while a series. ofports 13. are arranged adjacent. the head 14nd open'up comm ation between the chamber 13 and the chain er 2when the piston is at ithef forward limit of its stroke and permit the exhaust to pass from the chambers 2 2 into the chamber 2, while the ports 13 communicate with the chamber 2'E-when the piston is at the rearward portion of its stroke arge. -to enter into i the"ch'amber 13? and the chambers 2 2' to.

force theiston again forward.

The lc huck 10 has aseries of annular longitudinal grooves or apertures, 10 10, whichregister with apertures-2" of the web 2" to permit the exhaust charge" from the chamber 2'to pass out to the atmosphere, it being understood that the working age'pt entersthe chamber -1 through the bore orp'hamher 3 of the plug? from the chamber '5 of- -the collar 5', to. w 'ch it is admitted from the pipes7. p 1'5 designates what I the, support; casing, which comprisesanelon ated-tub lar ortion 15, having an interna bore 1 of such a diameter as to permit theready ovement of the drill-casin 1 therethr'o and this bore 15 -is smoot and' non-thr'eaded. The casing 15- is alsoproyided with a pair ofiupwardly-projecting ears 15" 159, provided with armg-apertures 15"15 to receive the shaft 16, which carries the hand wheel 17', by means of flvhich the shaft 16 is turned, The shaft-'16 isof such diameter as to snu 1y 'fit thcliearing-apertures 15, so that it W1 1' not turn freely. Mounted on the shaft 16 to turn therewith and between theears 15.15 is a worm gear-wheel 18, havinqperi heral gear.- teeth 18 to mesh with the l'ihrea ed gearportion 1" of the drill-casing 1, and the gear-18 I shall hereinafter term the ,friction wormgear, as such gear is held from free turnin motion by friction. lnt'egrally formed wit the casing portion 15 is a downwardly-projecting tubular shank 15*, which is adapted to be received by the bearing portion 19 of the double clamp member 19 and is tightly held in its adjusted position in such bearing portion '19 by the clamping-bolt 19*, as shown, thus permitting adjustment of the tool on an axis rumiing through the shank 15*.

The clamping member 19 is provided with a second clampmgportion 19 at right angles to the portion 19 to-receivc the supporting -'suppoirt 20 811(1 18 held on such support by the clam ing-bolt 21, as shown, thus permitting an a jhustment of the support on an axis runnin t rough the support 22.

y virtueof the several adjustments on the axis of theshank 15?, the sup orting member 20, and the sup ortin mem er 22 the tool may be adjuste to drill at any angle desired, as will be readily understood by reference to Fi 1 of the drawin s.

far as described the manner in which my invention operates will be best ex lained as follows: Proper adjustment of t e tool is made on 'the various su ports to brin the drill 11 at the proper ang e, the casing I sing at the-limit of its rearward position. The

stop-cock 7" is then opened to allow'the comit passes-into the barrel 2'to operate the hammer-piston 13;" which piston as it reaches the forward limit ofv its stroke impinges the drill 1 1 and drivesit, into the hole, the piston being reciprocatedautomatically b reason of the arrangement of the various in ct and exhaust ports, &c., ass-clearly understood by reference to the-drawings, the rearward movement of the piston being 'radually stopped before the f rward motion ibe ins, due to'the air-cushion formed in the e iamber 2 The forward motion of the piston as it strikes the drill 11' will cause the casin -1, with all of its carried arts, to be moved iorward automatically to e'ed the drill forward int'o the hole as the same is bein'gcut, it being understood that the force of the hammer 13 against the drill 11' is sufficient to. turn the shaft 16 and the worm-gear 18 inthe direction of the arrow (1 in Fig. 2.' As'the piston is gradually stopped onits rear movement by theair-cushion formed in the chamber 2", the backward stroke of the hammeriston does not tend to feed the casing bee ward. The forward stroke of the hammeriston being sudden and impacting causes sucii a jar as to force the casing forward. After the hole has beencut to the maximum length'possible with the engagement with the ear 18, after which the operator then draws t e casing 1 entirely out of the supporting-casing 15, and a new-drill can be then inserted into the chuck 10. j After this is done the operator again inserts the drill into the casing 15 and moves the same up until the drill has been inserted into the hole and is ready to continue cutting, The exact initial adjustment can be made by turning the crank 4 or by turning the handwheel 17,

From the foregoing it will be seen that the invention com rises a simple and effective construction drill of the class described and in which means are provided for readily and effectively removing the drilling mechanism from its support to insert a new drill and replacing the same 1n exactly the proper position with respect to the hole without the necessity of realining the drilling mechanism, thus saving a great deal of time in changing the bits and avoiding the necessity of readjusting the parts an obviating possible errors in such readjustments.

From the foregoing description, taken in connection with t e accompanying drawings,

it is thought the complete construction, op-

- eration, and many advantages of my invention will be readily unders ed by those skilled in the art'to which ,it appe'rtams, and I desire to say that slight "changes in the detailed construction, operation, and arrangement of parts may be made without departing from the scope of the appended claims and the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In-an apparatus of the class described, a supporting casin a drilli mechanism supported therein an feedable t erethrough, means cooperativel connecting the supportin -casing and the rilling mechanism to permit the drilling mechanism bein fed forward at each forward impulse of the rill-hammer, and means whereby said drilling mechanism can be bodily withdrawn from said sup orting pasi ig, substantially as shown an descri I 2. In an ap alatus of the class described, a drilling" mec ian'ism including a reciprocating hammer and a longitudinal drill-casin a supporting-casing for receiving said drificasing, said drill-casing having .anexterior thread, means whereby said drill-casing can be rotated on its longitudinal axis to feed the same forward, means carried by said supof a drill-casing am reciprocally mounted therein, means for op porting-casing for cooperatively engaging the threaded portion of the drill-casing to enable it to have a threaded connection with the drill casing, and .ineans whereby said lastnamed means can be released from operative connection with the drill-casing to permit the drill-casing being drawn out of the supporting casing, substantially as shown and described.

3. An apparatus of the class described, comprising a drill including a casing and a reciprocating hammer operable therein, said drill-casing having an externally-threaded portion, a supporting-casing having an internal bore for receiving said drill-casing, a drillcasing-engaging member on said supportingcasing for engaging said. threaded portion of the drill-casing to lock the same to the supporting-casing, means carried by the dr casing whereby the drill-casin can be turned on itslongitudinal axis to fee the same, said drill-casing and said drill-casing-engaging member being so arranged as to permit the drill to be automaticall fed forward on its lon itudinal axis at eac forward impulse of the ammer, all being arranged substantially as shown and described.

4. An apparatus of the class described, comprising a drill including a drill-casing and a reciprocating hammer operable therein,

said drill-casing having an externally-threaded portion, a supporting-casing hav ng an external bore for receiving said drill-casing, a drill-casing-engaging member on said supporting casin for engagin said threaded portion of the rill-casing to ock the same to the supporting-casing, means carried by the drill-casing whereby the casing can be turned on its longitudinal axis to feed the same, said drill casing and said drill-casing-engaging member being so arranged as to permit the drill-casing to be automaticall fed forward on its longitu'dinal alxis at each forward impulse of the hammer, and means for moving said member carried by the supporting-casing to move the drill-casing along its longitudinal axis through the su porting-casing substantially as shown and escribed.

5. An apparatus of the class described,

comprising a drilling mechanism'consisting a hammer mechanism crating said hammer mechanism, a sup ort ing-casin consisting of alongitudinal tuliiular member or receiving said drill-casing, said drillcasing capable of having" longitudinal movement through said supporting-casing, a screw connection between said supportingcasing and said drill-casing, means for turning said drill-casing on its longitudinal axis to feed the same, and means for movin said drill-casing longitudinally through sai supporting-casing, all being arranged substantially as shown and described.

6. An apparatus of the class described,

bore for receiving t e dri 'casing and said drill-casing, means for turning said drill-casing on its longitudinal axis to feed the same. menus for moving said drill-.

easing longitudinally through said supporting-casing, said drill-casing and said supporting-casing and their screw connections being arranged to permit automaticfeed of the drillcasing forward through the supporting-casing at each forward impulse of the hammer without rotating the casing, substantially as shown and described.

7. An apparatus of the class described, comprising a drillin mechanism consisting of a longitudinal tubular casin having an external thread, a hammer-barrl fitted within said casing, a drill-chuck within said hammer-barrel at its forward end, a closure-pl within said hammer-barrel at its rearwai end, inlet-apertures communicatin with the interior of the hammer-barrel, and the interior of the drill-casing, exhaust-ports for the hammer-barrel, and meeting hammer within the hammer-barre means for admitting compressed air into the drill-casing, a handle member secured to the drilling-casing whereby the same can be turned on its longitudinal axis a tubular sup orting casing having a l-casing, a wormgear mounted in said supportin -casing, and adapted to mesh with the thread on the drillcasing, a hand-wheel for turning said wormgcar, said wormear and said drill-casing bemg arranged to a low the drillcasing to automatically feed forward at the forward move-- ment of the hammer, while simultaneously mitting the drill-casing to be turned on its ib iigitudinal axis b means of the handle, all

.being arranged so stantially as shown and described.

8. An ap aratus of the class described, com rising rilling mechanism consisting of an e ongated tubular casing having an external thread, a tubular hammer-barrel fitted within said casing, a drill-chuck within said hammer-barre at its forw'ard end, a closureplug within said hammer-barrel at its rear ward end, inlet-apertures connecting'with the interior of the hammer-barrel and-the intetier of the drill-casing, exhaust-ports for the hammerbarrel, a reci roosting hammer within the hanune'r-barre. means for admitting compressed air into the drill-casing, a handle member secured to the drill cas whereby the same can be turned on its lOllgltudinal axis, ,a tubular su portingcasing havinga boreior receiving t e drill-casing, a

a hammer mechanism 2 i I i wormar mounted in said an porting-ca!- ing am adapted to mesh with t 0 threads on the drill-casing, a hand-wheel for turnin the wormear, said worm-gcar andsaid, rill casing eing arran d to allow the armlessing to be automatically fed forward by the forward movements of the hammer, wlnlesimultaneously permitting the drill-casing to be, turned on its longitudinal axis by means of the handle, and means for-mounting saidsupporting-casing to-pcrmit adiustment of, the drilling mechanism with the axis of the drill-casing at any angle substantially as shown and describe a 9. In arock-drill, a supporting-casing, a

drill-easing, screw connections between theand drill casin s, and means support-in whereby t c drill-casing can e ejected fromthe supporting-casing without turningthe:

same on its longitudinal axis.

10. In an apparatus of the class described the combination with the drill-casin a supporting-casing for receiving the dril -casin of means for screwing the drill-casing throu the supporting-casing, and means carried the su or'ting-easing. and 006 crating. with the dri l-casing for permitting t e drill-casing to be automaticall fed through the sup ortongitudinaling-casing in one irection b the imp se of the drill-hammer, substantia ly as shown and described.

11. In an apparatus of the class described,-

the combination with the drill-casin a supportingcasing for receiving the dril '-casi of means for screwing the drill-casing throu fii the supporting-casing, and means carried g the -su porting-casing and 006 crating with the dri l-casing for permitting t e drill-casingto be automatically fed through the sup rting-casing in one ircction by the imp se of the drill-hammer and means cooperating with said last-named means for moving the:

drill-casing through the su porting-casing iathe direction of itslongitu turning the drill casing substantially as shown and'described.

12. An apparatus of the class described, the combination with the drilling mechanism including a drill-casingand a reciprocating hammer, of a-su porting-casing a apted to receive said dril -casing, screw connections between said drill-casing and said supporting-casing, means carrie whereby thesame can be turned on its longitudinal axis to feed it through the supporting-casing, means carried by the supportingcasing for permitting the drill-casing to be moved in the direction of its longitudinal axis throu h the supporting-casing without rotating the drill-casing, substantially as shown and described.

13. An ap aratus of the class described,

hammer, of a supporting-casing'ac apted to by the drill-casing mal axis without receive said drill-casing, screw connections between said drill-casing, and said supportingcasing, meanscarried by the drill-casing whereby the same can be turned on its longitudinal axis to feed it through the supporting-casing, means carried by the'supportingcasing for permitting the drill-casing to be moved in the direction of its longitudinal axis through the supportiiw-axis without rotating the drill-casing, and or permitting the drill-casing to be fed through t e sup ortin casing, by each forward impulse of t e dril hammer, independent of the rotation of the drill upon its longitudinal axis substantially as shown and described.

14. An apparatus of the class described, com rising in combination with a drilling mec ianism including, a drill-casing and a reoiproeating hammer therein, of a supportingcasing, means for feeding the drill-casing through the supporting-casing, by rotating the same on its longitudinal axis and means for feeding the drill-casing through the supporting-casing without rotating the drill-casing on its longitudinal axis, substantially as shown and described.

15. In a rock-drill, a su portingecasing, a drill-casin connections between the su porting an drill casings whereby the dr 1- easing can be fed through the sup orting-casing, and means whereby the dril -casing can be ejected from the supporting-casing without turning the same on its longitudinal axis.

CLARK J. SMITH.

Witnesses:

ERNEST THORNTON, EMME'I A WORK. 

